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Finding the Fourth Proportional to 126.45, 188.76 and 125.16

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Solution

The fourth proportional to 126.45, 188.76 and 125.16 is: 186.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.45 : 188.76 = 125.16 : x
  2. Step 2: Convert to fraction form
    126.45/188.76 = 125.16/x
  3. Step 3: Cross multiply
    126.45x = 188.76 × 125.16
  4. Step 4: Simplify right side
    126.45x = 23,625.20
  5. Step 5: Solve for x
    x = 23,625.20/126.45
  6. Step 6: Final answer
    x = 186.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.